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A father pulls his son, whose mass is 26.7 kg and who is sitting on a swing with ropes of length 3.27 m, backward until the rop...Asked by Khalid
A father pulls his son, whos mass is 25 kg and who is sitting on a swing with ropes of length 3 meters, backward until the ropes make an angle of 33.6 degrees with respect to the vertical. He then releases his son from rest. What is the speed of the son at the bottom of the swinging motion?
Answers
Answered by
Damon
How high?
Draw it.
h = L - L cos 33.6 = L(1-cos33.6)
= 3(1-.833) = .501 meters up
Potential energy increase = m g h
= 25 (9.81) (.501)
Ke = (1/2)(25) v^2 = 25(9.81)(.501)
cancel the mass and
solve for v = sqrt(2 g h) as usual :)
Draw it.
h = L - L cos 33.6 = L(1-cos33.6)
= 3(1-.833) = .501 meters up
Potential energy increase = m g h
= 25 (9.81) (.501)
Ke = (1/2)(25) v^2 = 25(9.81)(.501)
cancel the mass and
solve for v = sqrt(2 g h) as usual :)
Answered by
Momo
the answer is wrong
it will equal = 3.135
it will equal = 3.135
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